Congrats! Definitely a good idea to go to the accepted student days.
I would suggest he base his final choice on affordability (if it is a factor) then academic fit, social fit, and any other things he may care about (ex. location, Greek Life, big time sports as a few examples). If it is a factor consider how each college can accommodate his learning difference.
Personally I would not focus on how much he feels each college “wants” him unless it gets tied into something concrete like an invitation to an honors program, merit money etc. Other than those type of things it is a function of the admissions department and once he is on campus he will never deal with them again.
I do agree that the college search process gives a parent some wonderful insights into their kid’s thought process. Your son sounds successful and very well grounded so congrats!